Given the same amount of money, I would prefer just SS and personal savings.
The reason is that of the 3 only SS and personal savings are tax advantaged. The pension even interferes with the other two and make them more taxable.
To be more explicit, 15% of SS income is tax-free for everybody. It could be more if one was lower income. Of personal savings, return of capital is tax-free, Long-term capital gains may be tax-free, and qualified dividends may be tax-free. One can juggle all these to reduce one's income tax burden to essentially zero. However, if you throw in a pension, then it mucks up everything.